hovland



A. I. HOVLAND.

SPROCKET DRIVE CHAIN.

APPLICATION HLFD JUNE 16, 1913.

Patented Aug. 8, 1916 2 SHEETS-SHEET 1.

R x Z Z 2 WW m 7 M g m a H Aw, v m 3/3 A. I. HOVLAND.

SPROCKET DRIVE CHAIN.

APPLICAUON FILED JUNE 16, 19m.

Patented Aug. 8, 1916.

2 SHEETS-SHEET 2.

ANTON I. HQVLAND, 0F MARSHALL, INNE QTA- srsocxs'r DBIVE-GHAlN.

spscifrcation pf L tters Patent- Potcnted Aug. 8, 1916,-

Applicat-ion f e ime 16, 19 13: Serial No. 73,982.

To this end my inn rtiou consists generally in various eons trons and combo nations, al as heneinatter described and particularly poii-ited out in the claims.

In the .accoin a-uying drawings forming part of this spccii on, Figure 1 is a plan view of'a portion ,ot a s nzoc ket 'Chain with my inrention app-lied til-tenets, Fig. is a side M n ofzthe some, Fig. is a sectii-u al vie-iv through the rain, Fig. l is a l eta.il secti nal riew, shot.

on the line w w of Fig. 1, Fig. 13 is a siin. Xvi, sprocket is worn, Fig 7 is a sectional viewon the line 1/- l of Fig. 3, Fig. 8 is a perspective view, illustrating the means for taking up the near of the links on the sprocket ivhcels, Fig. 9 is a perspective riew, s'hsm'i ng .the pi-rotal connection between the links.

In the din-wings, 2 and 3 represcrf the side bars of the links, the links '2 on each side of the vchain being arranged lo lap over the adjacent ends of the bars 3. The li.nks I have sockets l therein adapted to receive the ruds .of the bushings 5. prorixlod \with flat surfaces I; and with surfaces 7 which are tapered slightly, the sur' faces .6 litttng upon correspoluling flat sur the liars '3 and the tapered surcorrespmaiding surfaces .9.

a Tl re ta 1 rc-r o l- .(ElnaM'ing the bars '3 irnax'ardly or together when slraiu is aj rplied to the chain. The bushing-s 5 may be turncdend for end in the links @or ,tle air-pose of raising or Luvering the axis )l the bore of the bushings to compensa e for wear of the sprocket teeth.

' g the pins reiiersed {oshorten the chain, Fig. 5 IS}; sectional new "lhese ends .are

lwsc surfaces has the effect of.

This is illustrated in Figs. 5 and in which the different positions the bushings are shown. In Fig. (3 the bushing is reversed from its positio i Fig. Z; to raise'the lin gs.

This changing of the pitch line is important in a device of this kind where it is impracticable to reverse the belt when it becomes worn.

-Loo ely mounted on the bushings 5 are anti-frictimi rollers 10. These rollers have a slight endwise movement and are adapted to bear on the teeth of the sprocket wheels. As before stated, the bars 2 lap ()YCI the bars 3 and for the purpose of connecting these bars with one another I pr0- ride pivots consisting of pins 11 having flattened end portions 12 which passthi'ough correspondingly shaped openings in the bars 2 and through the bushing 5, said end portions being ecccntrically arranged with respect to the middle portions of the pins and having holes in their outer ends to receive cotter pins 13 which serve to secure the bars of the chain links together. These pins may he removed from the link bars and re- .vcrsed and owing to the eccentric arrangement of their hearings in the bars of one link with respect to the bars of the other link, any lost motion resulting from wear of the bars may "be taken up.

' To separate the links, the cotter pins a re removed, as indicated in Fig. 4, whereupon the pins 11 can be pulled out and turned over and the bushings may also be separated from the bars 3 and reversed, and wear or any loosencss or lost motion in the chain quickly eliminated.

I claim as my invention 1. A sprocket chain having links composed of side bars, the bars of one link lapping over the adjacent bars of the adjoining link, bushings mounted in the inner lJZLlS "of said links and having eccentric openings therein, and pins having eccentric surfaces fitting within said openings and seated in the outer bars of said links, said bushings and pins being capable .of being tTirned end for end, for the pur -rose specified.

2. A sprocket chain com -irising links compo d of side bars, l-nishings having end portions fitting within the side bars of some of said links, said bushings haying fiat and tapered surface at their ends seated against corresponding surfaces in said bars, wherebushings being adapted to be turned end for 10 by strain on said bars will draw them inend to raise or lower the links. 7 Wardly on said bushings, and pivot pins In witness whereof, I have hereunto set passing through said bushings and having my hand this 6th day of June, 1913.

5 hearings in the bars of said other links. 1 NTON HOVT \ND 3. A sprocket chain comprising links having side bars, pivot pins for said links, and \Vitnesses: bushings having eccentrically arranged EDWARD A. PAUL, openings therein to receive said pins, said GENEVIEVE E. SORENSEN. 

